Purple Math
Purplemath: Cramer's Rule
Cramer's Rule for solving a system of equations is presented here using an example of a system in three variables with three equations. The "everything," approach of solving for all three variables is shown as well as the "selective,"...
Lesson Tutor
Lesson Tutor: A Beginning Look at Basic Algebra
Twelve lessons are provided as an introduction to basic algebra. Each covers the topic clearly, providing examples with explanations as well as practice problems and their solutions for the user. Topics highlighted here include: solving...
Other
Algebra.com: Solution: Given a System of Two Equations in Two Variables
This activity shows an example of how to solve a system of equations using elimination. Each step is explained in detail. Additional links are provided for more information on properties of equality, solving equations, and solving a...
Math Medics
S.o.s. Math: Equations Involving Fractions
An explanation on how to solve fractions in rational equations which mentions what to do when extraneous solutions occur when solving.
Varsity Tutors
Varsity Tutors: Hotmath: Algebra Review: Properties of Square Roots
Find a quick, concise explanation of the properties of square roots. An example is given and clearly explained for each property.